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1.
Lichitsky B. V. Komogortsev A. N. Belyi R. M. Dudinov A. A. Krayushkin M. M. 《Russian Chemical Bulletin》2009,58(7):1538-1541
A convenient method was developed for the synthesis of previously unknown substituted 6,7-dihydro-4H-isothiazolo[4,5-b]pyridin-5-ones based on the three-component condensation of 4-aminoisothiazole hydrochlorides, Meldrum’s acid, and aromatic
aldehydes. 相似文献
2.
R. S. Iskhakov E. A. Denisova S. V. Komogortsev L. A. Chekanova Yu. E. Kalinin A. V. Sitnikov 《Physics of the Solid State》2010,52(11):2263-2266
This paper reports on the results of the investigation of the relation between the magnetic microstructure and ferromagnetic
resonance (FMR) in ferromagnetic metal-insulator composites by using granular alloys (Co41Fe39B20)
x
(SiO2)1 − x
and Co
x
(SiO2)1 − x
as an example. A comparative analysis of the properties of FMR spectra and parameters of random magnetic anisotropy leads
to correlations between these quantities. It has been found that the main mechanism that determines the FMR line width in
the films under investigation is the exchange narrowing mechanism. 相似文献
3.
Andrey N. Komogortsev Boris V. Lichitsky Alexander D. Tretyakov Artem N. Fakhrutdinov Arkady A. Dudinov Michail M. Krayushkin 《Journal of heterocyclic chemistry》2019,56(11):3081-3087
A convenient approach to the synthesis of the previously unknown 7H‐furo[3,2‐b]pyran‐7‐ones based on the intramolecular cyclization of carbonyl derivatives of 5‐hydroxy‐2‐methyl‐4H‐pyran‐4‐one has been elaborated. Key intermediates in the synthesis of the target 7H‐furo[3,2‐b]pyran‐7‐ones are 3‐hydroxy‐6‐methyl‐2‐(2‐oxo‐2‐arylethyl)‐4H‐pyran‐4‐ones. They are formed as a result of multicomponent condensation of 5‐hydroxy‐2‐methyl‐4H‐pyran‐4‐one with arylglyoxals and 4‐methoxyaniline. 相似文献
4.
M. M. Krayushkin D. V. Pashchenko B. V. Lichitsky B. V. Nabatov A. N. Komogortsev L. G. Vorontsova Z. A. Starikova 《Russian Chemical Bulletin》2008,57(10):2168-2174
The reactions of dithienyl-substituted furanones with hydrazines afford the corresponding pyridazinone-bridged dithienylethenes
with photochromic properties. The structure of 4,5-bis-(2,5-dimethyl-3-thienyl)-2,6-dimethyl-2H-pyridazin-3-one was established by X-ray diffraction. 相似文献
5.
B. V. Lichitsky R. M. Belyi A. N. Komogortsev A. A. Dudinov M. M. Krayushkin 《Russian Chemical Bulletin》2009,58(2):387-391
A convenient method was developed for the synthesis of the previously unknown substituted 6,7-dihydro-4H-thieno[3,2-b]pyridin-5-ones based on the three-component condensation of 3-aminothiophenes, Meldrum’s acid, and aromatic aldehydes. 3-Aminothiophenes
are easily formed in situ by decarboxylation of 3-aminothiophene-2-carboxylic acids in an acidic medium. Sodium salts of the latter acids were prepared
by alkaline hydrolysis of the corresponding available esters. 相似文献
6.
Volochaev M. N. Komogortsev S. V. Myagkov V. G. Bykova L. E. Zhigalov V. S. Shestakov N. P. Velikanov D. A. Smolyakov D. A. Luk’yanenko A. V. Rachek V. B. Loginov Yu. Yu. Tambasov I. A. Matsynin A. A. 《Physics of the Solid State》2018,60(7):1425-1431
The results of structural and magnetic investigations of nanogranular Co–Al2O3 films formed from Co3O4/Al thin-film layered structures upon vacuum annealing are reported. The Co3O4/Al films have been obtained by sequential reactive magnetron sputtering of a metallic cobalt target in a medium consisting of the Ar + O2 gas mixture and magnetron sputtering of an aluminum target in the pure argon atmosphere. It is shown that such a technique makes it possible to obtain nanogranular Co–Al2O3 single- and multilayer thin films with a well-controlled size of magnetic grains and their distribution over the film thickness.
相似文献7.
Andrey N. Komogortsev Valeriya G. Melekhina Boris V. Lichitsky Mikhail E. Minyaev 《Journal of heterocyclic chemistry》2021,58(3):864-872
A convenient method for the synthesis of novel imidazole-2-thione derivatives containing allomaltol fragment was elaborated. This approach includes one-pot multicomponent reaction of allomaltol, arylglyoxals, primary amines followed by addition of alkyl or aryl isothiocyanates. It was shown that the key intermediates of the studied process are substituted α-aminoketones and the corresponding imidazolidine-2-thione. The advantages of this synthesis are mild reaction conditions, atom economy, and easy workup procedure, which can avoid chromatographic purifications. The structures of an intermediate imidazolidine-2-thione and one of the final imidazole-2-thiones were determined by X-ray diffraction. 相似文献
8.
B. V. Lichitsky R. M. Belyi A. N. Komogortsev A. A. Dudinov M. M. Krayushkin 《Russian Chemical Bulletin》2013,62(4):1026-1031
A method for the synthesis of 2,5′-dioxo-3′-phenyl-5′,6′-dihydro-4′H-spiro[indoline-3,7′-thieno[3,2-b]pyridine]-2′-carboxylic acids was elaborated based on the three-component condensation of 3-aminothiophenes, Meldrum’s acid, and isatines. 相似文献
9.
R. S. Iskhakov S. V. Komogortsev 《Bulletin of the Russian Academy of Sciences: Physics》2007,71(11):1620-1622
The magnetic microstructure of nanostructured ferromagnets is an ensemble of stochastic magnetic domains—regions with sizes of the same order of magnitude as the length of magnetic orientation coherence. It is shown that the magnetization saturation curves can be used to determine the size of an element of the micromagnetic structure (stochastic domain size) and the effective anisotropy in this element, the size of a nanostructure element and its local anisotropy, and the dimension of exchange-coupled ferromagnetic nanoparticles. 相似文献
10.
R. S. Iskhakov S. V. Komogortsev A. D. Balaev A. V. Okotrub A. G. Kudashov V. L. Kuznetsov Yu. V. Butenko 《JETP Letters》2003,78(4):236-240
The cooperative phenomena revealed in the field and temperature dependences of the magnetization in a system of iron nanoparticles in carbon nanotubes were studied experimentally. The character of the temperature dependences of the magnetization indicates that the ferromagnetic Fe particles in carbon nanotubes are exchange-coupled. In the region where the magnetization approaches saturation, the magnetization curves reveal the power dependence ΔM~ H?3/2 typical for a one-dimensional system of exchange-coupled ferromagnetic nanoparticles. 相似文献